Downloading tabnine binary after installing: Permission denied about jupyter-tabnine

i don't have this issue and im using anaconda3. I think you should look for the permissions of the file by running ls or stat:
ls -l '/usr/local/lib/python3.6/dist-packages/jupyter_tabnine/binaries/2.5.1/x86_64-unknown-linux-gnu/TabNine'
then you will see the permission at the first row, this is looks like good explaination of Linux Permissions.

the resolution might be adding exec flag to the binary running chmod, like following:
chmod +x '/usr/local/lib/python3.6/dist-packages/jupyter_tabnine/binaries/2.5.1/x86_64-unknown-linux-gnu/TabNine'

I added this link as it might help for further reading:
https://stackoverflow.com/questions/36434764/permissionerror-errno-13-permission-denied

[wenmin-wu]

@BrunoGomesCoelho , try this

pip3 install jupyter-tabnine --user
jupyter nbextension install --py jupyter_tabnine --user
jupyter nbextension enable --py jupyter_tabnine --user
jupyter serverextension enable --py jupyter_tabnine --user

The package will be installed under the user's dir.

Please re-open it, if you still have the problem.